Haskell Relational Record

What is HRR?

Haskell Relational Record (HRR) is a query generator based on typed relational algebra and correspondence between SQL value lists and Haskell record types, which provide programming interfaces to Relational DataBase Management Systems (RDBMS).

• Abstracted - relations are expressed as high level expressions and they are translated into SQL statements. Drivers are provided for DB2, PostgreSQL, SQLite, MySQL, Microsoft SQL Server and OracleSQL.
• Type safe - SQL statements produced by HRR are guaranteed to be valid if the Haskell code compiles. Even the types of placeholders are propagated.
• Composable - relations can be composed to build bigger relations.
• Automatic - SQL schema is obtained from a target DB and Haskell types are automatically generated at compile time.

Documentation

• Quick start
• Tutorial
• Examples
• Manual
• Frequently Asked Questions
• Technical information

Questions

If you have any questions and/or suggestions, please submit github issues.

Authors and contributors

• Kei Hibino, Shohei Murayama, Shohei Yasutake, Sho Kuroda and Kazu Yamamoto